Under the Microscope,you Observe the First Few Cell Divisions of an Embryo.Instead

question 40

Multiple Choice

Under the microscope,you observe the first few cell divisions of an embryo.Instead of dividing the entire ball,the divisions are only separating the top half into smaller and smaller spheres.The bottom half appears to remain as one large cell.What is a likely explanation?

• A)It is a bird or fish embryo.
• B)A developmental error has occurred.
• C)Gastrulation has occurred.
• D)The bottom half is the notochorD.

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